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From: Ingo Molnar <mingo@kernel.org>
To: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@redhat.com>,
	linux-kernel@vger.kernel.org,
	"H. Peter Anvin" <hpa@linux.intel.com>,
	Jiri Kosina <jkosina@suse.cz>,
	Steven Rostedt <rostedt@goodmis.org>,
	Jason Baron <jbaron@akamai.com>,
	yrl.pp-manager.tt@hitachi.com, Borislav Petkov <bpetkov@suse.de>
Subject: Re: Re: [PATCH -tip 3/3] x86: Remove unused text_poke_smp and text_poke_smp_batch
Date: Mon, 22 Jul 2013 12:01:58 +0200	[thread overview]
Message-ID: <20130722100158.GB908@gmail.com> (raw)
In-Reply-To: <51ECEF8D.60109@hitachi.com>


* Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:

> (2013/07/22 17:21), Ingo Molnar wrote:
> > 
> > * Ingo Molnar <mingo@kernel.org> wrote:
> > 
> >>
> >> * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
> >>
> >>> Since introducing the text_poke_bp for all text_poke_smp*
> >>> callers, text_poke_smp* are now unused. This basically
> >>> reverts 3d55cc8a, 7deb18dc and related commits.
> >>>
> >>> This also fixes a Kconfig dependency issue on STOP_MACHINE
> >>> in the case of CONFIG_SMP && !CONFIG_MODULE_UNLOAD.
> >>>
> >>> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
> >>> ---
> >>>  arch/x86/Kconfig                   |    5 --
> >>>  arch/x86/include/asm/alternative.h |   11 ----
> >>>  arch/x86/kernel/alternative.c      |   98 +-----------------------------------
> >>>  3 files changed, 2 insertions(+), 112 deletions(-)
> >>
> >> Hm, it does not build with the attached config:
> >>
> >> arch/x86/kernel/kprobes/opt.c: In function 'setup_optimize_kprobe':
> >> arch/x86/kernel/kprobes/opt.c:394:6: error: dereferencing pointer to incomplete type
> >> arch/x86/kernel/kprobes/opt.c:395:6: error: dereferencing pointer to incomplete type
> >> arch/x86/kernel/kprobes/opt.c:396:6: error: dereferencing pointer to incomplete type
> > 
> > 32-bit appears to be the key pattern.
> 
> Ingo, please make sure your x86/jumplabel tree picked all of my patches.
> This 3/3 strongly depends on the previous 1/3 and 2/3.
> Without it, kprobes/opt.c can not be build because it still uses the
> text_poke_params data structure which 3/3 removes.

Yes I know, and it was on top of -tip which already had these included:

 51b2c07b2226 x86: Make jump_label use int3-based patching
 fd4363fff3d9 x86: Introduce int3 (breakpoint)-based instruction patching

without these the third patch wouldn't even apply I think.

Thanks,

	Ingo

  reply	other threads:[~2013-07-22 10:02 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-18 11:47 [PATCH -tip 0/3] kprobes, x86: Move optprobe on top of int3-based instruction patching Masami Hiramatsu
2013-07-18 11:47 ` [PATCH -tip 1/3] [CLEANUP] kprobes/x86: Remove an incorrect comment about int3 in NMI/MCE Masami Hiramatsu
2013-07-21 13:43   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2013-07-18 11:47 ` [PATCH -tip 2/3] kprobes/x86: Use text_poke_bp() instead of text_poke_smp*() Masami Hiramatsu
2013-07-21 13:43   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2013-07-18 11:47 ` [PATCH -tip 3/3] x86: Remove unused text_poke_smp and text_poke_smp_batch Masami Hiramatsu
2013-07-21 13:43   ` [tip:perf/core] kprobes/x86: Remove unused text_poke_smp() and text_poke_smp_batch() functions tip-bot for Masami Hiramatsu
2013-07-22  7:18   ` [tip:x86/jumplabel] " tip-bot for Masami Hiramatsu
2013-07-22  7:43   ` [PATCH -tip 3/3] x86: Remove unused text_poke_smp and text_poke_smp_batch Ingo Molnar
2013-07-22  8:04     ` Masami Hiramatsu
2013-07-22  8:21     ` Ingo Molnar
2013-07-22  8:38       ` Masami Hiramatsu
2013-07-22 10:01         ` Ingo Molnar [this message]
2013-07-22 10:11           ` Masami Hiramatsu
2013-07-22 10:21             ` Ingo Molnar
2013-07-22 13:53               ` Jiri Kosina
2013-07-23  8:10                 ` Ingo Molnar
2013-07-18 22:24 ` [PATCH -tip 0/3] kprobes, x86: Move optprobe on top of int3-based instruction patching Jiri Kosina
2013-07-20  1:35 ` Steven Rostedt

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